?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENGARUH+TEMPERATUR+TEMPERING+TERHADAP%0D%0AKEKERASAN+DAN+STRUKTUR+MIKRO+BAJA+AISI+1045%0D%0AYANG+DIQUENCHING+DALAM+MEDIA+PENDINGIN%0D%0ATERSIRKULASI&rft.creator=Hanif+Mustofa%2C+1315021027&rft.subject=620+Ilmu+teknik+dan+ilmu+yang+berkaitan&rft.description=Baja+AISI+1045+adalah+baja+yang+tergolong+sebagai+baja+karbon+sedang+karena%0D%0Amemiliki+kadar+karbon+0%2C45+%25.+Karakteristik+pada+baja+sendiri+terkadang+tidak%0D%0Asesuai+dengan+kebutuhan+yang+diperlukan%2C+oleh+karena+itu+baja+tersebut%0D%0Amembutuhkan+perlakuan+lain+untuk+merubah+sifat+dan+struktur+baja+AISI+1045.%0D%0AKarakteristik+pada+baja+dapat+di+rubah+dengan+memberikan+perlakuan+panas%2C+salah%0D%0Asatu+proses+yang+dilakukan+adalah+proses+quenching+tempering.+Quenhcing+adalah%0D%0Aproses+pengerjaan+logam+dengan+pendinginan+secara+cepat+pada+variasi+media%0D%0Ayang+telah+ditentukan+dengan+tujuan+untuk+meningkatkan+kekerasan+baja+AISI%0D%0A1045%2C+sedangkan+tempering+merupakan+proses+pemanasan+kembali+baja+yang%0D%0Asudah+dikeraskan+dengan+tujuan+untuk+memperoleh+keuletan+dan+ketangguhan%0D%0Ayang+tinggi.%0D%0AProses+quenching+menggunakan+suhu+800+%C2%B0C+dengan+lama+waktu+tunggu+60+menit%0D%0Akemudian+didinginkan+secara+cepat+dengan+variasi+solar%2C+air%2C+dan+air+garam+dengan%0D%0Aproses+tersirkulasi+180%C2%B0.+Sedangkan+variasi+temperatur+tempering+yang+digunakan%0D%0Aadalah+450+%C2%B0C%2C+550+%C2%B0C%2C+dan+650+%C2%B0C+dengan+lama+waktu+tunggu+60+menit.+Hasil%0D%0Adari+uji+kekerasan+menggunakan+metode+rockwell.+pada+pengujian+raw+material%0D%0Amendapatkan+niai+kekerasan+sebesar+61%2C33+HRB.+Hasil+quenching+yang%0D%0Atersirkulasi+pada+media+solar+yaitu+(80.6+HRB%2C+79%2C3+HRB%2C+81%2C3+HRB)%2C+nilai%0D%0Akekerasan+pada+media+air+(89%2C3+HRB%2C+89+HRB%2C+89%2C6+HRB)%2C+dan+media+air+garam%0D%0Ayaitu+(94%2C6+HRB%2C+96+HRB%2C+94%2C6+HRB).+Nilai+kekerasan+variasi+temperatur+temper%0D%0A450+%C2%B0C+media+solar+(+72%2C6+HRB+73+HRB%2C+72%2C6+HRB)%2C+media+air+(83%2C6+HRB%2C+82%2C6%0D%0AHRB%2C+83+HRB)%2C+air+garam+yaitu+(86%2C3+HRB%2C+86%2C6+HRB%2C+87%2C3+HRB).+Nilai%0D%0Akekerasan+temperatur+temper+550+%C2%B0C+media+solar+yaitu+(70%2C3+HRB%2C+70%2C3+HRB%2C%0D%0A70%2C6+HRB)+media+air+yaitu+(+81%2C3+HRB%2C+81%2C3+HRB%2C+80%2C6+HRB)+media+air+garam%0D%0A(84%2C3+HRB%2C+83%2C6+HRB%2C+84%2C6+HRB).+Nilai+kekerasan+variasi+temperatur+temper+650%0D%0A%C2%B0C%2C+media+solar+yaitu+(68%2C3+HRB%2C+68%2C6+HRB%2C+68%2C6+HRB)+media+air+(+79+HRB%2C+79%2C3%0D%0AHRB%2C+79%2C3+HRB)+dan+media+air+garam+(81%2C3+HRB%2C+81%2C6+HRB%2C+82+HRB).+Struktur%0D%0Amikro+yang+didapatkan+pada+quenching+yaitu+struktur+martensite+dan+tempering%0D%0Astrukturnya+temper+martensite.+Kata+kunci%3A+AISI+1045%2C+quenching%2C+tempering%2C+martensite%2C+ferrit%2C+pearlite%2C+HRB.%0D%0AAISI+1045+steel+is+steel+classified+as+medium+carbon+steel+because+it+has+a+carbon%0D%0Acontent+of+0.45%25.+The+characteristics+of+steel+itself+are+sometimes+not+in%0D%0Aaccordance+with+the+needs+required%2C+therefore+the+steel+requires+other+treatments+to%0D%0Achange+the+properties+and+structure+of+steel+AISI+1045.+The+characteristics+of+steel%0D%0Acan+be+changed+by+giving+heat+treatment%2C+one+of+the+processes+carried+out+is+the%0D%0Aquenching+tempering+process.+Quenching+is+a+metal+working+process+with+rapid%0D%0Acooling+to+a+predetermined+variety+of+media+with+the+aim+of+increasing+the%0D%0Ahardness+of+AISI+1045+steel%2C+while+tempering+is+the+process+of+reheating+hardened%0D%0Asteel+with+the+aim+of+obtaining+high+tenacity+and+toughness.%0D%0AThe+quenching+process+uses+a+temperature+of+800+%C2%B0+C+with+a+waiting+time+of+60%0D%0Aminutes+and+then+cooled+quickly+with+variations+of+diesel%2C+water%2C+and+salt+water%0D%0Awith+a+180+%C2%B0+circulating+process.+While+the+tempering+temperature+variations+used%0D%0Aare+450+%C2%B0+C%2C+550+%C2%B0+C%2C+and+650+%C2%B0+C+with+a+waiting+time+of+60+minutes.+The+results%0D%0Aof+the+hardness+test+using+the+Rockwell+method.+in+raw+material+testing+get+a+value%0D%0Aof+61.33+HRB+hardness.+The+quenching+results+circulated+in+the+solar+media+are%0D%0A(80.6+HRB%2C+79.3+HRB%2C+81.3+HRB)%2C+the+value+of+violence+in+the+water+media+(89.3%0D%0AHRB%2C+89+HRB%2C+89.6+HRB)%2C+and+salt+water+media+(94+%2C+6+HRB%2C+96+HRB%2C+94.6%0D%0AHRB).+The+hardness+value+of+temperature+temperament+450+%C2%B0+C+solar+media+(72.6%0D%0AHRB+73+HRB%2C+72.6+HRB)%2C+water+media+(83.6+HRB%2C+82.6+HRB%2C+83+HRB)%2C+salt%0D%0Awater+(86.3+HRB%2C+86.6+HRB%2C+87.3+HRB).+Temper+temperature+hardness+value+of%0D%0A550+%C2%B0+C+solar+media+namely+(70.3+HRB%2C+70.3+HRB%2C+70.6+HRB)+water+media+(81.3%0D%0AHRB%2C+81.3+HRB%2C+80.6+HRB)+salt+water+media+(84+%2C+3+HRB%2C+83.6+HRB%2C+84.6%0D%0AHRB).+The+hardness+value+of+temperature+variation+of+650+%C2%B0+C%2C+solar+media+are%0D%0A(68.3+HRB%2C+68.6+HRB%2C+68.6+HRB)+water+media+(79+HRB%2C+79.3+HRB%2C+79.3+HRB)%0D%0Aand+salt+water+media+(81+%2C+3+HRB%2C+81.6+HRB%2C+82+HRB).+The+microstructure%0D%0Ao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